10 mm Glock Semiauto PistolFixed Sights2-10 rd magsThe G20 is about stopping power. If optimum self defense, control,and power is what you are looking for, the G20 is the best of the breed, with lots of big, fast bullets in a manageable package.Glock pistols are the perfect combination of reliability and accuracy.They also have 50 % fewer parts so there is less to break. Glock engineers designed these handguns to live up to the legendary " out of the box" reliability.